Remove dependency on Illuminate

[martingold]

Hi,

looks like a well-written library, which i would love to use. I noticed that it has dependency on a Illuminate\Support\Collection which registers a lot of global functions and is generally annoying. Would you be comfortable merging a PR getting rid of it?

Thank you.

[autaut03]

Hey. Thank you :) Although I must say I haven't had the time to invest in this project further.

I don't like Laravel's collections, but they do improve readability that native array functions don't. Do you have any other library candidates in mind, or were you thinking of arrays?